John h



(No Model.)

J.- H. ANDERSON. Y

. HYDRAULIC DREDGB. 4 No.-'2 94,30s.,:

"Pa ented Feb. 2 1884.

ATTORNEYS.

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.operated by a windlass.

UNITED STATES PATENT OFFICE.

JOHN H. ANDERSON, OF SHELBY, NEBRASKA.

HYDRAULIC DREDGE.

SPECIFICATION forming part of Letters Patent No. 294,303, dated February 26, 1884.

Application filed September 20, 1883. (No model.)

To allwhom it -m-a,y concern.-

Be it known that 1, JOHN H. ANDERsoN, of Shelby, in the county of Polk and State of Nebraska, have invented a new and Improved Hydraulic Dredge, of which the following is a full, clear, and exact description.

The object of the invention is to improve the operation of hydraulic dredge-tubes, so that the water which is forced through them may be made to work up against the under part of the sediment as the tube-nose passes beneath it, and thus effectually divide and scatter it, while valves prevent any backfiow of water into the tube.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of my hydraulic dredge, illustrating its mode of operation. Fig. 2 is a longitudinal sectional elevation of the dredging-pipe, and Fig. 3is a top or plan view of the same. Fig. 41s a side elevation of the bearings for the trunnions of the dredgingpipe, and Fig. 5 is a top or plan View of the same.

A is the forward part of the steamboat, on the bow a of which the dredging-pipe Bis mounted, and in which are the steam-pump O, the Windlass D, and apparatus for their operation. The boat A is preferably propelled by steam, in which case the steam-boiler is used for the purpose of supplying steam for the operation of the pump 0; but the boat may be propelled by any other'known methodsuch as by a cable attached to an anchorage and The dredge-pipe B is mounted by the trunnions b in the bearings 12 by which it is adapted to a vertical motion, and also secured to the boat by the cap 12 and bolts If. The outer part of the dredge-pipe B is supported and adjusted by a chain .or rope, F, which is attached to dredge-pipe B at g, and, passing over the pulley g is secured to a windlass, D. The outer end of the dredge:

pipe B is formed into a shovel-shaped nose, b made sharp at its extremity b and adapted to' penetrate the material in which it is to be operated. On the upper side of the nose b are valves b 22*, opening outward and adapted as outlets for the water forced through the dredgepipe 13. The inner and upper end of the dredge-pipe B is connected with the steampump 0 by means of the hoseE and coupling e. O is a steam-pump. of any ordinary construction, operated with steam supplied from the boiler ordinarily used for supplying steam to the engine for propelling the boat or from a boiler provided for the purpose. 1

The operation is as follows: The boat A is placed in position near to the bar or other deposit which it is required to remove, and by means of the windlass D and chain F the dredge-pipe or dredge-pipes B are lowered and adjusted, so that aforward motion of the boat A will cause them to penetrate the material of the bar. The boat is then made to moveforward, and at thesame time the pump C is put in operation, and thus a stream of water is forced through the dredge-pipes B and valves b against thematerial composingthe bar, which is thus excavated and scattered and caused to mingle with the current of the stream, and is by itcarried away. The dredge-pipes A are adjusted from time to time by means of the windlass D and chain or rope F, and the boat is advanced or otherwise adjusted, and the operation is continued until tirely removed.

The advantages of my hydraulicdredge are the great facility with which bars and sedimentary deposits may be removed therewith, the simplicity of its construction, and the ease with which it may be moved from place to place and operated.

Having thus described my invention, what I the deposit is enclaim as new, and desire to secure by Letters Patent, is

1. A hydraulic dredge-tube having its nose J. A. INKS, J P. KINNEY. 

